I've received mixed answers on this:
-- Some users in the Community have said their time updated automatically, while others say it did not.
-- A Marketo support rep told me it
doesn't happen automatically. (I opened a support ticket about this)
-- Another Marketo employee said the GMT offset time
does update automatically in the regions that use standard or daylight time at different parts of the year. (see more here:
https://community.marketo.com/MarketoIdeaDetail?id=08750000000KIhGAAWSo the non-clear-cut answer I've come to is....perhaps for those of us whose time didn't update automatically, we had our org set on an incorrect time zone prior to the clock change.